I have a Vypyr Tube 60. Whenever I turn my amp on or off, I hear a faint "tink" sound (similar to that metallica "tink" sound when you turn an electric base-board heater on). I'm wondering if this is normal? Only noticed it a few weeks ago after a tech opened up my amp to fix it. Is this just the tubes warming up or turning on or something? Is the sound normal?

My 15W Laney occasionally makes a 'tchew!' Star Wars laser sound when I turn it off, which I'm fairly confident is just tubes being tubes.
I've played through a really old Peavey something-or-other (Valveking maybe?) that makes a sound like a spring ringing whenever you turn it on or moved it; it's one of the least reliable amps I've ever touched. I hope it's just reverb springs or something..

Nothing to worry about man. I think it's just the expansion of the metal as it heats up.

That's what I was thinking too. Thanks. Mine does it when I first turn it on and warm it up in standby, then again when I turn the full amp on, then again when I turn off the amp. So this makes sense, the metal is probably expanding and contracting when warming/cooling, just like a base-board heater I used as an example.